Tube seat



May 9 1933.

C. A. HULSART TUBE SEAT Original Filed Dec. 18, 1928 FigCZ- INVENTOR Maw ATTORNEYS.

' ed for use in connection Patented May 9, 1933 UNI D STATES,

. CHARLES A. nULsAn'r, or

PATENT OFFICE WESTFIELI), NEW JERSEY, ASSIGNOR TO THE BABCOCK &

'WIIIGOX COMPANY, 01! BAYONNE, NEW JERSEY, A CORPORATION OF JERSEY I TUBE SEAT Application flleii- December 18, 1928, Serial No. 326,778. Renewed May 27, 1932.

This invention relates to a novel and improved form of tube seat particularly adaptwith high-pressure receptacles such as a boiler drum. In the accompanying drawing, in which I have shown selected embodiments of the invention: (Fig. 1 is a fragmentary-sectional view through a portion of a drum wall showing a tube expanded into a hole therein.

Figs. 2 and 3 are views similar to Fig. l, but showing different formswhich the invention may take.

Referring" first to Fig. 1,"I have shown therein a portion 1 of the wall of a high pressure receptacle which may conveniently be a drum in a high-pressure boiler. Such a drum is provided with the relatively thick wall shown in this drawing. Ext-ending through the wall is a hole 2 which is shown as being formed of two portions, 3 and 4. The portion 3 isof substantially the same diameter as the interior 5 of the tube 6, while the portion 4 is of substantially the same diameter as the exterior 7 of the same tube.

Between the two portions 3 and 4, the wall 1 is provided with two circumferential grooves 8 and 9 defining between them a rib 10 which extends inwardly towards the center of the hole. The tube endll is expanded outwardly into the groove 9 and contacts with the rib 10 as pla1nly shown, and it will be obvious that the interior 5 of the tube will be in substantial alignment with the surably, a welded joint 12 is provided between the tube end and the rib.

By the above construction, the welded joint effectively seals the tube to the receptacle, thereby preventing leakage. The narrow rib 10 will prevent an undue amount of heatirom the welding operation from reaching 4 the metal of the wall 1. This rib is preferably made long and relatively" thin for this purpose. Moreover, the rib may y eld slightly when the tube end 1s expanded into the groove 9, in case the tube is somewhat too lon In Fig. 2 is shown a construction s1m1lar to that 1n Fig. 1, except that here the tube the invention may take.

face Of the portion 2 0f the hole. Prefer nd being expanded jntg a between, and a tube end 11 is provided with a circumferential groove 13 adjacent the welded joint. This groove will limitthe amount of heat from the welding process which might pass along the tube.

In Fig. 3'is shown a still third form which In this form the groove 9 is of a form to snugly receive the expanded end'll' of the tube. Otherwise,

' this form corresponds closely to that shown -in Fig. 1.

I claim: I

1. In combination, a high-pressure receptacle having a'thick wall with a tube hole therethrough, a rib extending inwardly towards the center of said hole between the ends thereof, and a tube extending into said hole and having its end engaging said rib and welded thereto.

2. In combination, a high-pressure receptacle having a thick wall with a tube hole therethrough, a rib extending inwardly to- .Wards the center of said hole between the ends thereof, and a tube extending into said hole and having its end engaging said rib and welded thereto, said tube end being expanded 1nto a groove in said wall adjacent said rib.

3. In combination, a high-pressure receptacle having a thick wall with a tube hole therethrough, a narrow projection extending inwardly towards the center of said hole between the ends thereof, and a tube extending into said hole and having its end engaging said projection and welded thereto, said tube groove in said wall adjacent said projection.

4/ In combination, a high-pressure receptacle having a thick wall with a tube hole therethrough, said Wall within the hole having two circumferential grooves defining a rib there extending into said hole and having its end expanded into one of said grooves and engaging said rib.

5. In combination, a high-pressure receptacle having a thick wall with a tube hole therethrough, said wall within the hole hav ing two circumferential groovesdefining a rib therebetween, and a tube extending into said hole and having its end expanded into one of said grooves and engaging said riband welded thereto.

6. In combination, tacle having a thick wall with a. tube hole therethrough, said hole havin two portions, one of said ortions having su stantiall the diameter the interior of a tube, an the other of said portions having substantially the diameter ofthe exterior of a tube, a tube disposed in said second-named portion, with its end adjacent said first-named portion, a rib between theends of the hole and extending inwardly towards the center of said hole and engaging said tube end, and a welded joint between said end and rib.

.7. In combination, a high-pressure receptacle having a thick wall .with a tube hole therethrough, said hole ha'ving two portions,

diameter of the interior of a tube, an the other of said portions having substantially theidiameter of the exterior 0 a tube, a tube disposed in said second-named portion with its endadj acent said first-named portion and expanded into a groove in said wall, and a rib between the ends of the hole and extending inwardly towards the center of said hole between said first-named portion and sai tube end and engaging the tube end.

8. In combination, a high-pressure receptacle'havinga thick therethrough, said hole having two-portions, one'of said portions having substantiallg diameter of the interior of a tube, an the other of said ortions havin substantially the diameteroi the exterior o a tube, a tube disposed in said second-named portion with its end adjacent said first-named portion and expanded into a groove in said wall, a rib 40 between theends of the hole and extending inwardly towards the center of said hole between said first-named portion and said tube end and engaging the tube end, and a welded joint between said end and rib.

9. In combination, a high pressure receptacle having a thick wall with tube holes formed therethrough, narrow circumferential projections originating at positions removed from the outer ends of the tube holes and extending from the metal of the wall, and tubes expanded against the wall in the tube holes and end welded to the projections.

10. In combination, a high pressure receptacle havin a thick wall with a tube hole therethroug a narrow projection extending inwardly towards the center of said hole between the ends thereof, and a tube extending lnto said hole and having its" end engaging said projectlon and welded thereto, said tube end being expanded against the sides of the tube hole.

11. In combination, a high pressure recep- 'tac1e having a thick wall with a tube hole therethrough, said wall within the hole having two circumferential grooves defining a a high-pressure recepm end portions one of saidportions having substantiall the P wall 'with a tube hole 7 rib therebetween, and a tube extending into said hole and having its end expanded there- I 12. In combination, a high pressure recep-. tacle having a thick wall with a tube hole therethrough, said wall within the hole having two circumferential grooves defining a rib therebetween, and a'tube extending into said hole and having its end expanded against the walls of the tube hole and welded to the rib. j

13. In a pressure vessel capable of withstanding high fluid pressures, a thick metallic wall having tube seats formed therein in tube holes extending through the wall, tubes in communication with the vessel and having expanded against the walls of the tube seats, and flexible metallic parts. suported by the wall and extending into contact with the tube ends, the tubes being end welded to said parts.

14. In combination, a pressure'vessel having a'thick wall with tube seats formed as holes therethrough, circular extensions originating at the sides of the tube holes and extendin therefrom, tubes extending through the tu e holes with their ends contiguous d to the free ends of the extensions and end welded thereto.

CHARLES A. HULSART.

the- 

